Crawford avalanche. (Grayling, Mich.) 1879-19??, 1887-11-03
MRcHANICAL.


Spors may be taken from gliding by
mmersing the articles in solution OF
alum in pure soft water. Dry with
Iawdust.
FIBERITE is q new insulating mate
rial made from wood pulp, and is being |
lsed for storage cells and by various
electrical concerns. 1t is said to give
,atisfaction.
SOME German investigators have cal
ctilated the relative liability OF injury
10 the eye, finding that il all parts OF
The body were equally exposed to in
Jury, wounds of the eye would bear to
wounds Of other parts the proportion
Of one in about 600; as matter of fact,
the proportion is about thirty-six in
1000.
A METHOD by which the immense de-
posits of iron sand which abound on
the coast of New Zealand can be sue
cessfully utilized has been brought
forward. The feature Of the new pro.
cess consists in uniting a quantity of
scoria with the sand when put in the
blast. This, it seems, has the effect OF
preventing the iron from oxidizing, an
obstacle that has heretofore never been
successfully overcome in smelling iron
sand.
READERS whose books have been or
are likely to be attacked by mildew
may preserve them to some extent by
placing saucer of quicklime near, in
the bookcase or shelf, or where con-
venient. The lime absorbs the excess
of moisture, and must be renewed, as
it becomes slaked and loses its strength.
1t is equally good for putting in linen
chests, iron safes, or wherever there Is
likely to be any mustiness owing to the
exclusion of fresh air.
TaoUGH it is claimed as one of the
advantages of electricity that it does not
raise the temperature of the atmosphere
when used for lighting, it is neverthe'
less, says La Nature, capable, under
certain conditions of evolving heat
This property is about to be turned to
profitable account by the Societe des
Usines Electriques, of Berlin, who have
1 to light, they y'@iIfi np5 51}Ageaiet ADDITION
nish supply of electricity for heating
purposes. The appliances which th'
|
been constructed in view of the use Il
which they are to be put. For instance
for boiling water they have contrived
vessel having two cases, between whlci
is placed resistance coil. 1t is state'
! that with this appliance about ! pint
of water can be raised to boiling poin
/ with four amperes 100 volts. In ce1
tain theaters electric stoves are EN-
ployed for heating the curling tongs
the use of gas jets and spirit lamps be
, ing vigorously forbidden.
A DEFECTIVE blow-off is always
serious defect. If it is in snch cor
D dition that it will not hold water it Ii
5 of course, dangerous. All kinds
: valves, whether straightway, globe, G
any other form of construction yet d'
: ~i,,,tl for valves, -unsuiteble tl.i.e
!. for closing blow-off pipes. 1hey a
: have the grave defect that pieces
|. scale or other hard substances are III
! BILE to get under the valve and prevel
! it's closing; and there is no way to te
q whether this has happened in any pa
@ ticular case except by examining Il
s end of the blow-off pipe after the val
IL is supposed to be closed, to see wheth
> it leaks or not Plug-cocks as they a
= ordinarily made are always givir
IS trouble by leakage; pieces OF scale
3 other gritty substances cat the pl'
:, and body; they are liable to stick
IL that it is with great difficulty they CT
n be opened, and various other thin
20 make them source of much troubl
az but for all this it is positively knoN
Sc at any time by simple inspection
!! the plug itself whether it is shut
In not, and the amount of leakage, if the
as is any, generally shows for itself arou
IN the plug, so we are inclined, in spite
~ its grave defects, to give preference
~ the common plug-cock over any To-
De of valve, as a means of closing bio
IN off pipes. But an improved form
IL; plug-cock has within few years be
ot put upon the market Originally,
u. vised in England) which is, with'
~, question, superior to anything else
ng blow-offs. 1t is made of iron, is p
" tected from corrosion, by Profes
ne Barff's process, and is packed with
ry bestos. Wherever it has been trie'
an has given most satisfactory results,
OF is undoubtedly the best blow-of va
ne made.-The Locomotive.